#define  _CRT_SECURE_NO_WARNINGS 1	
#include <stdio.h>
#include<assert.h>
void* my_memcpy(void* dest, const void* src, size_t sz)
{
	assert(dest && src);
	void* ret = dest;
	while (sz)
	{
		*(char*)dest = *(char*)src;
		 dest = (char*)dest + 1;
	     src = (char*)src + 1;
		 sz--;
	}
	return ret;
}
int main()
{
	int arr1[20] = { 0 };
	int arr2[] = { 1,2,3,4,5,6,7,8,9,10 };
	my_memcpy(arr1, arr2, 40);
	for (int i = 0; i < 10; i++)
	{
		printf("%d ", arr1[i]);
	}
	return 0;
}